Question: What is the safety classification and labelling of carbon monoxide that's NFPA Instability is 0?
Paraphrase: According to the NFPA Instability, what is the safety classification and labelling of carbon monoxide 0?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q2025 p:P4952 ?s . ?s ps:P4952 ?obj . ?s pq:P995 ?x filter(contains(?x , '0')) }